(;AB[bq]AB[cq]AB[dq]AB[dp]AB[do]AB[co]AB[cn]AB[cm]AB[bm]AB[am]AW[al]AW[bl]AW[cl]AW[dl]AW[dm]AW[dn]AW[eo]AW[ep]AW[eq]AW[dr]AW[cr]AW[br]AW[cp]AW[bp]AW[bo]AP[goproblems]
(;B[ap];W[ao];B[aq]C[RIGHT])
(;B[aq];W[ap]
(;B[bn];W[ao]LB[an:A])
(;B[ao];W[an]))
(;B[ao];W[aq]LB[bn:A]C[Black cannot play at A.]))